Large-length-diameter-ratio silk screen wick rolling device and method

Abstract

The invention provides a large-length-diameter-ratio silk screen liquid absorption core rolling device and method. The device comprises a base, a core rod, a plurality of rolling units and a driving assembly. The mandril is used for winding a silk screen; the multiple rolling units are arranged at intervals in the axial direction of the core rod and fixed to the base. The driving assembly is connected to the core rod and used for driving the core rod to rotate. Each rolling unit comprises a support, at least three pressing rollers and a pressing plate. The bracket is fixed on the base; the at least three compression rollers are rotatably mounted on the bracket and surround to form a rolling space for clamping a core rod, at least one compression roller is a position-adjustable movable compression roller, and the movable compression roller is provided with an opening station far away from the core rod and a rolling station tightly pressed on the core rod; the pressing plate is rotatably connected to the support and is provided with an opening position for avoiding the core rod and the silk screen and a pressing position for pressing the edge of the silk screen on the core rod or the lower silk screen. High-precision and high-quality production of the silk screen wick with the large length-diameter ratio can be achieved, and the production efficiency is high.

Description

Technical Field

[0001] This invention relates to the field of wire mesh absorbent core rolling technology, and more specifically, to a wire mesh absorbent core rolling device and method with a large aspect ratio. Background Technology

[0002] A heat pipe is a highly efficient heat transfer element that utilizes the phase change of a working fluid for heat transfer. It mainly consists of a shell, a wick, and a working medium (working fluid). High-temperature heat pipes typically operate at temperatures above 500℃. The working fluid is usually an alkali metal such as lithium, sodium, or potassium. The shell is typically made of stainless steel or high-temperature alloys. The wick is usually made of materials such as wire mesh, fiber felt, or sintered porous powder. The specific working principle of a heat pipe is as follows: One end of the heat pipe is the evaporation section, and the other end is the condensation section. Depending on the application, an adiabatic section can be placed between the two sections. The evaporation section is located at the heat source. During operation, the working fluid in the evaporation section is heated and evaporates into a gas. Under a small pressure difference, the gas flows through the adiabatic section to the condensation section. In the condensation section, the vapor is cooled and condensed back into liquid, releasing heat. The liquid accumulated in the wick of the condensation section flows back to the evaporation section under the capillary force of the wick, thus repeatedly transferring heat.

[0003] As can be seen from the working principle of heat pipes, the driving force for the internal gas-liquid phase change and flow circulation during the operation of high-temperature heat pipes comes from the capillary force of the wick. Therefore, the structure of the wick is an important factor affecting the performance of heat pipes. A good wick structure should have the characteristics of regular shape without defects, high dimensional accuracy, strong capillary force, and low flow resistance. This places extremely high demands on the design and manufacturing of the wick.

[0004] Therefore, the wick is one of the core functional components of a heat pipe, especially a high-temperature heat pipe, and its performance directly determines the heat transfer limit, isothermal properties, and reliability of the heat pipe. An ideal wick should possess characteristics such as regular shape, precise dimensions, strong capillary force, and low flow resistance. Wire mesh wicks are widely used due to their regular structure, excellent capillary performance, and relatively mature manufacturing process.

[0005] With the development of fields such as micro nuclear reactors (heat pipe microreactors), aerospace, and high-power electronic heat dissipation, the demand for high-temperature heat pipes with large aspect ratios (e.g., length exceeding 4 meters and diameter less than 20 millimeters) is becoming increasingly urgent. However, rolling the wire mesh wick of such ultra-slender heat pipes presents numerous technical challenges: 1) Prone to wrinkling and loosening: When rolling the wire mesh by hand or with simple tools on ultra-long scales, it is difficult to ensure that the wire mesh is wound evenly and flatly on the mandrel, which easily produces wrinkles, gaps or local loosening, destroying the uniformity and consistency of the liquid absorption core structure.

[0006] 2) Difficulty in controlling dimensional accuracy: The larger the length-to-diameter ratio, the more difficult it is to ensure the tension control of the wire mesh and the consistency of the tightness between the coils during the winding process. This results in uneven axial distribution of the inner diameter, outer diameter and mesh density of the final liquid absorbent core, which affects the performance of the heat pipe.

[0007] 3) Low production efficiency: Traditional methods rely on skilled workers to operate manually, and the steps are cumbersome (such as threading the net, pressing the edges, winding, and fixing). For liquid-absorbing cores that are several meters long, the winding process is time-consuming and inconsistent, making it difficult to meet the needs of mass production. Summary of the Invention

[0008] (a) Technical problems to be solved The technical problem to be solved by the present invention is that the existing manufacturing of large aspect ratio wire mesh liquid absorbent cores generally suffers from problems such as easy wrinkling, difficulty in size control, and low efficiency.

[0009] (II) Technical Solution To achieve the above objectives, the technical solution adopted by the present invention is as follows: In a first aspect, the present invention provides a high aspect ratio wire mesh liquid-absorbing core winding device, comprising a base, a core rod, multiple winding units, and a drive assembly; the core rod is used to wind the wire mesh; the multiple winding units are arranged at intervals along the axial direction of the core rod and fixed on the base; the drive assembly is connected to the core rod and is used to drive the core rod to rotate; wherein each winding unit includes a support, at least three pressure rollers, and a pressure plate; the support is fixed to the base; at least three pressure rollers are rotatably mounted on the support and surround to form a roller pressing space for clamping the core rod, wherein at least one pressure roller is position-adjustable. The movable pressure roller has an open position away from the mandrel (away from the mandrel for insertion and removal of the mandrel) and a winding position that presses against the mandrel (pressing against the mandrel surface to provide necessary clamping force and rolling support); the pressure plate is rotatably connected to the bracket and has an open position that avoids the mandrel and wire mesh (avoiding the mandrel placement and initial wire mesh insertion), and a pressed position that presses the edge of the wire mesh against the mandrel or the lower wire mesh (its working end can firmly press the starting edge of the wire mesh against the mandrel surface or the already wound lower wire mesh).

[0010] Preferably, the number of pressure rollers is four, including two fixed lower pressure rollers and two movable pressure rollers, with the two movable pressure rollers located above the mandrel. The two lower pressure rollers support the mandrel from the bottom, while the two movable pressure rollers apply pressure from both sides above, forming a stable four-point clamping structure, ensuring that the mandrel is both firmly fixed and can rotate flexibly during rotation.

[0011] Preferably, the bracket has a pair of mirror-shaped adjustment holes, and the two movable pressure rollers can move along the adjustment holes to switch between the opening station and the winding station. Further, the movable pressure rollers are connected and fixed to an adjustment mechanism, and driven by the adjustment mechanism (such as an eccentric wheel or linear guide module), the movable pressure rollers can move along the adjustment holes, thereby switching between the opening and pressing stations.

[0012] Preferably, the adjusting hole is a V-shaped hole. The V-shaped hole can limit the rotation axis of the movable pressure roller to ensure its stability at the opening / winding station. In addition, the V-shaped structure provides a self-centering guide, which can automatically adapt to and tightly press against mandrels of different diameters when the movable pressure roller moves towards the center, while ensuring symmetrical pressure on both sides.

[0013] Preferably, the pressure plate includes a connecting plate, a connecting arm, and a pressing plate. The connecting plate is rotatably connected to the bracket, one end of the connecting arm is fixedly connected to the connecting plate, and the other end of the connecting arm is fixedly connected to the pressing plate.

[0014] Preferably, the shape of the pressing surface of the pressing plate matches the outer periphery of the mandrel. For example, it is designed as an arc-shaped surface that matches the outer circle of the mandrel to increase the contact area, ensure uniform pressing effect, and prevent the wire mesh from warping.

[0015] Preferably, the support / pressure plate is made of metal or plastic. The pressure roller is made of at least one of metal, plastic, rubber, and ceramic, and the mandrel is made of metal. Regarding material selection, the support and pressure plate can be made of metal (such as steel or aluminum alloy) or engineering plastic with sufficient rigidity and strength. The pressure roller can be made of metal, plastic, rubber, or ceramic, or undergo surface coating treatment (such as rubber coating) to protect the mandrel and wire mesh surface while providing sufficient support. The mandrel is preferably a high-strength metal round rod with a polished or hardened surface to ensure rigidity and surface finish.

[0016] Secondly, the present invention also provides a method for rolling a high aspect ratio wire mesh liquid-absorbing core, which is implemented using a high aspect ratio wire mesh liquid-absorbing core rolling device and includes the following steps: S1. Place the movable pressure roller in the open position and place the mandrel in the roller pressing space. Then drive the movable pressure roller to the winding position to press and fix the mandrel. Specifically, adjust the movable pressure rollers of all winding units to the open position, insert the mandrel into the roller pressing space of all winding units, and place it on the lower pressure roller. Then, adjust all movable pressure rollers to the winding position to press the mandrel from above and the side, so that it is firmly clamped at multiple points but can rotate freely.

[0017] S2. Introduce the end of the wire mesh from one side of the pressure plate and allow part of its width to pass through the roller pressing space; specifically, introduce the starting end of the wire mesh from the side where the pressure plate is located and allow it to pass laterally through the roller pressing space surrounded by the pressure roller and the mandrel.

[0018] S3. Rotate the mandrel to wind the end of the wire mesh onto the mandrel to form the first turn; specifically, start the drive assembly to drive the mandrel to rotate slowly. When the mandrel rotates, it uses the friction between itself and the wire mesh to wrap the end of the wire mesh that has passed through it around its own surface to form a tight first turn.

[0019] S4. When the first winding is completed and the end of the wire mesh is exposed from above, rotate the pressure plate to the pressed position to press the end of the wire mesh firmly under the wire mesh to be wound next. Then continue to rotate the mandrel to complete the winding of all the wire mesh. Specifically, when the first winding is completed and the starting end of the wire mesh is exposed again from above the winding layer, stop rotating. At this time, rotate the pressure plate from the open position to the pressed position, and use the pressing plate to firmly press the exposed starting edge of the wire mesh, pressing it firmly under the second winding of wire mesh to be wound. After pressing, restart the drive assembly, and the mandrel continues to rotate. Since the starting edge has been fixed by the pressure plate, the subsequent winding of wire mesh will firmly press it down, thereby preventing the starting end from lifting or loosening during the entire winding process and ensuring smooth winding. Continue winding until the entire wire mesh is tightly wound on the mandrel.

[0020] S5. Weld the starting and ending ends of the wound wire mesh to form a circumferentially continuous wire mesh sleeve. Specifically, after winding, the starting and ending ends of the wire mesh are joined together and welded using appropriate methods such as resistance spot welding or laser welding to form weld points at the joint. This creates a circumferentially continuous, seamless wire mesh sleeve.

[0021] Preferably, the method further includes the following steps: S6. Insert the welded and shaped wire mesh sleeve, along with the mandrel, into the heat pipe shell. Then, remove the mandrel, leaving the wire mesh sleeve inside the shell to form a wick. Specifically, carefully insert the welded and shaped wire mesh sleeve, along with its internal mandrel, as a whole into the target heat pipe shell. Then, slowly and smoothly remove the mandrel from one end of the shell. Because the mandrel surface is smooth and the rolling process is flat, the wire mesh sleeve can basically maintain its shape and remain on the inner wall of the shell, thus forming the final desired wire mesh wick.

[0022] (III) Beneficial Effects The above-described technical solution of the present invention has at least the following advantages: Compared with the prior art, the large aspect ratio wire mesh liquid absorption core winding device and method provided by the present invention have the following significant advantages: 1. High winding precision and quality: Multiple winding units arranged along the mandrel's axial direction provide uniform support and clamping along the entire length of the mandrel, effectively preventing deflection and deformation of the mandrel with a length-to-diameter ratio during winding. The design of movable pressure rollers and pressure plates ensures uniform tension, tight interlayer spacing, and firm compression of the starting end of the wire mesh throughout the winding process, fundamentally eliminating defects such as wrinkles and loose loops, and guaranteeing the consistency of the absorbent core dimensions and the regularity of the structure.

[0023] 2. Simple operation and improved efficiency: The automated operation replaces the traditional manual winding. The rapid opening and closing of the movable pressure roller and the uniform rotation of the drive components make the steps of feeding, threading, winding, and pressing the edges simple and quick, significantly reducing the skill requirements and labor intensity of the operators, and greatly improving production efficiency.

[0024] 3. High versatility and adaptability: By adjusting the position of the movable pressure roller in the adjustment hole, this device can be adapted to mandrels of different specifications within a certain diameter range. The modular winding unit design also facilitates the adjustment of the number and spacing of support points to meet the manufacturing needs of liquid-absorbing cores of different lengths.

[0025] 4. Facilitates subsequent assembly: Step S6 in the method ensures that the fragile wire mesh sleeve is always supported by a rigid mandrel as an inner lining during the transfer to the heat pipe shell, greatly reducing the risk of deformation during transfer and installation. The smooth surface of the mandrel facilitates easy removal, effectively guaranteeing the quality of the final liquid-absorbing core. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of the high aspect ratio wire mesh liquid absorption core winding device provided in the embodiment of the present invention.

[0028] Figure 2 This is a schematic diagram of the structure of the rolling unit provided in an embodiment of the present invention.

[0029] Figure 3 This is one of the implementation flowcharts of the large aspect ratio wire mesh liquid absorption core winding device provided in the embodiments of the present invention.

[0030] Figure 4 This is the second implementation flowchart of the large aspect ratio wire mesh liquid absorption core winding device provided in the embodiments of the present invention.

[0031] Figure 5This is the third implementation flowchart of the large aspect ratio wire mesh liquid absorption core winding device provided in the embodiments of the present invention.

[0032] Figure 6 This is a schematic diagram of the structure of the formed wire mesh sleeve provided in an embodiment of the present invention.

[0033] The labels for the attached figures are as follows: 100. Wire mesh; 110. Welding point; 1. Base; 2. Mandrel; 3. Rolling unit; 31. Support; 32. Pressure roller; 33. Pressure plate; 311. Adjustment hole; 321. Lower pressure roller; 322. Movable pressure roller; 331. Connecting plate; 332. Connecting arm; 333. Pressing plate. Detailed Implementation

[0034] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0035] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be located directly on or indirectly on the other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to the other component.

[0036] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate that the device or element must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or the number of technical features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. The specific implementation of this invention will be described in more detail below with reference to specific embodiments: like Figure 1 , Figure 2 and Figure 3As shown, this embodiment of the invention provides a high aspect ratio wire mesh wick winding device, including a base 1, a mandrel 2, multiple winding units 3, and a drive assembly (not shown). The mandrel 2 is used to wind the wire mesh. The multiple winding units 3 are arranged at intervals along the axial direction of the mandrel 2 and fixed on the base 1. The multiple winding units arranged at intervals along the axial direction solve the problems of mandrel deflection and wire mesh unevenness caused by the "high aspect ratio". It provides continuous and uniform multi-point support for the ultra-long mandrel, ensuring that the mandrel maintains extremely high straightness throughout the winding process, thereby laying the geometric foundation for the flatness and equidistant winding of the wire mesh, and directly improving the dimensional accuracy and axial uniformity of the wick. A drive assembly is connected to the mandrel 2 to drive its rotation. Each winding unit 3 includes a support 31, at least three pressure rollers 32, and a pressure plate 33. The support 31 is fixed to the base 1. The at least three pressure rollers 32 are rotatably mounted on the support 31 and surround it to form a rolling space for clamping the mandrel 2. At least one pressure roller 32 is a position-adjustable movable pressure roller 322, which has an open position away from the mandrel 2 and a winding position that presses against the mandrel 2. The "rolling space" formed by the multiple pressure rollers constitutes a precise mandrel clamping and guiding mechanism. The rotatable pressure rollers convert the sliding friction between the mandrel and the support into rolling friction, allowing the mandrel to be driven to rotate easily and smoothly. Secondly, the surrounding layout provides radial constraint for the mandrel, preventing it from radially jumping or deviating during rotation and ensuring the concentricity of the winding. The pressure plate 33 is rotatably connected to the bracket 31 and has an open position that avoids the mandrel 2 and the wire mesh, and a pressed position that presses the edge of the wire mesh tightly against the mandrel 2 or the lower layer of wire mesh. When the pressure plate is in the open position, it completely avoids the mandrel, facilitating the initial threading and first winding of the wire mesh. When the pressure plate is in the pressed position, it firmly presses the exposed starting edge of the wire mesh after the first winding onto the surface of the mandrel (or under the subsequent winding layers of wire mesh). This ensures that the starting end is fixed throughout the entire subsequent winding process, preventing it from springing back or lifting, thus ensuring a tight fit between the first winding of the wire mesh and the mandrel, as well as between each winding of wire mesh, fundamentally eliminating defects such as overall wrinkling and loose winding caused by the loosening of the starting end in traditional methods.

[0038] In one embodiment, the number of pressure rollers 32 is four, including two fixed lower pressure rollers 321 and two movable pressure rollers 322, with the two movable pressure rollers 322 located above the mandrel 2.

[0039] In one embodiment, the bracket 31 has a pair of mirror-arranged adjustment holes 311, and two movable pressure rollers 322 can move along the adjustment holes 311 to achieve switching between the opening station and the winding station.

[0040] In one embodiment, the adjustment hole 311 is a V-shaped hole.

[0041] In one embodiment, the pressure plate 33 includes a connecting plate 331, a connecting arm 332, and a pressing plate 333. The connecting plate 331 is rotatably connected to the bracket 31, one end of the connecting arm 332 is fixedly connected to the connecting plate 331, and the other end of the connecting arm 332 is fixedly connected to the pressing plate 333.

[0042] In one embodiment, the shape of the pressing surface of the pressing plate 333 matches the outer peripheral side of the mandrel 2.

[0043] In one embodiment, the support 31 / pressure plate 33 is made of metal or plastic.

[0044] In one embodiment, the material of the pressure roller 32 includes at least one of metal, plastic, rubber and ceramic, and the mandrel 2 is made of metal.

[0045] Secondly, the present invention also provides a method for rolling a high aspect ratio wire mesh liquid-absorbing core, which is implemented using a high aspect ratio wire mesh liquid-absorbing core rolling device and includes the following steps: S1. Place the movable pressure roller 322 in the open position and place the mandrel 2 in the roller pressing space. Then drive the movable pressure roller 322 to the rolling position to press and fix the mandrel 2. S2. Introduce the wire mesh end from one side of the pressure plate 33, and let part of its width pass through the roller pressing space; S3. Rotate the mandrel 2 to wind the end of the wire mesh onto the mandrel 2 to form the first turn; S4. When the first winding is completed and the end of the wire mesh is exposed from the top, rotate the pressure plate 33 to the pressing position to press the end of the wire mesh tightly under the wire mesh to be wound next. Then continue to rotate the mandrel 2 to complete the winding of all the wire mesh. S5. Weld the starting and ending ends of the wound wire mesh to fix it, forming a circumferentially continuous wire mesh sleeve. Specifically, as follows: Figure 6 As shown, after welding is completed, weld points 110 are formed on the wire mesh 100.

[0046] In one embodiment, the following steps are also included: S6. Place the welded and shaped wire mesh sleeve together with the mandrel 2 into the heat pipe shell, and then pull out the mandrel 2, leaving the wire mesh sleeve inside the shell to form a liquid suction core.

[0047] The following are the specific implementation steps provided by the present invention: This invention provides a high aspect ratio wire mesh absorbent core winding device. The device mainly includes a long, narrow base 1 to provide a stable mounting foundation. A slender core rod 2 is placed horizontally; its length can be customized according to the required absorbent core length, typically exceeding 4 meters, and its diameter is less than 20 millimeters. Multiple winding units 3 with identical structures are equidistantly mounted on the base 1 along the axial direction of the core rod 2 using bolts or other fasteners. One end (or both ends) of the core rod 2 is connected to a drive assembly (not shown in the figure, but can be a servo motor, stepper motor, or reducer) via a coupling or similar means.

[0048] Specifically, each winding unit 3 has a main body consisting of a rigid support 31, typically made of aluminum alloy or steel. The lower part of the support 31 is fixed to the base 1. In the middle of the support 31, four pressure rollers 32 are installed, including two fixed lower pressure rollers 321 and two adjustable movable pressure rollers 322. The axes of the two lower pressure rollers 321 are fixed, supporting the mandrel 2 from below. The two movable pressure rollers 322 are mounted on a movable slider via bearings, the slider being nested within a pair of V-shaped adjustment holes 311 opened in the upper part of the support 31. By driving the slider to move (specifically, this can be achieved by connecting the output end of a cylinder to the slider via a connecting rod), the movable pressure rollers 322 can be driven to slide along the V-shaped adjustment holes 311. When the movable pressure roller 322 slides outward to the upper part of the V-shaped hole, it is in the open position, at which time the mandrel 2 can be easily inserted or removed. When the movable pressure roller 322 slides inward to the lower part of the V-shaped hole, it is in the winding position, at which time the two movable pressure rollers 322 and the two lower pressure rollers 321 together clamp the mandrel 2 from all sides. The design of the V-shaped hole enables the movable pressure roller 322 to have a self-centering function when pressing, ensuring that the mandrel 2 is evenly clamped.

[0049] On one side of the bracket 31, a pressure plate 33 is mounted via a pivot. The pressure plate 33 is specifically constructed by welding or as a single unit three parts: a connecting plate 331, a connecting arm 332, and a pressing plate 333. The connecting plate 331 is fixed to the pivot. The connecting arm 332 extends laterally from the connecting plate 331. The pressing plate 333 is fixed to the end of the connecting arm 332, and its inner side is machined with a shallow arc-shaped concave surface that matches the outer circular surface of the mandrel 2. The pressure plate 33 can rotate around the pivot to an open position (e.g., ...). Figure 3 As shown, the raised position) and the pressed position (as shown) Figure 5 As shown, it rotates between the pressed state and the other state.

[0050] The working process of the device of the present invention, namely the method of rolling a large aspect ratio wire mesh liquid-absorbing core, combined with Figures 3 to 6 The explanation is as follows: First, adjust the movable pressure rollers 322 of all winding units 3 to the open position, insert the mandrel 2 between the pressure rollers of all units, and place it flat on the lower pressure roller 321 (e.g., Figure 3(As shown in a). Then, adjust all movable pressure rollers 322 to the winding position and press the fixed mandrel 2 (as shown in a). Figure 3 (as shown in b).

[0051] Next, insert the starting end of the wire mesh 100 laterally into the pressure plate 33 from one side (left side of the figure). Place the pressure plate 33 in the open position (as shown in the figure). Figure 4 (as shown in c)

[0052] The drive assembly is activated, and mandrel 2 begins to rotate slowly counterclockwise (from the perspective shown in the diagram). The rotating mandrel 2 drives the wire mesh 100, winding its starting end around its own surface to form the first turn (as shown in the diagram). Figure 4 (as shown in d).

[0053] When the first winding is complete and the starting end of the wire mesh 100 is exposed from above, stop rotating. At this point, manually (or via a simple drive mechanism) rotate the pressure plate 33 to the pressed position. The arc-shaped surface of the pressure plate 333 firmly presses the exposed starting end of the wire mesh onto the mandrel 2 (e.g., ...). Figure 5 (as shown in e)).

[0054] After clamping, the drive assembly is restarted, and the mandrel 2 continues to rotate at a constant speed. Throughout the subsequent winding process, the pressure plate 33 remains in the pressed position to ensure that the starting end is continuously clamped and prevents it from warping. The wire mesh 100 is wound flat and tightly layer by layer onto the mandrel 2 until the entire roll of wire mesh is used up (e.g., ...). Figure 5 (as shown in f).

[0055] After winding, flip open the pressure plate 33. Use a miniature resistance spot welder to spot weld at the overlap, forming several strong weld points 110 (e.g., Figure 6 As shown in the figure, a complete and closed cylindrical wire mesh sleeve is obtained.

[0056] Finally, the transfer is performed: the entire wire mesh sleeve with mandrel 2 is carefully inserted into the pre-prepared heat pipe shell. Then, mandrel 2 is slowly and smoothly pulled out axially from one end of the shell. Due to the tight and flat winding and the smooth surface of mandrel 2, the wire mesh sleeve can basically maintain its shape and adhere to the inner wall of the shell, thus becoming the desired wire mesh wick.

[0057] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for rolling a high aspect ratio wire mesh liquid-absorbing core, characterized in that, include: Base; Mandrel, used for winding wire mesh; Multiple winding units are arranged at intervals along the axial direction of the mandrel and fixed to the base; A drive assembly, connected to the mandrel, is used to drive the mandrel to rotate; Each of the winding units includes: The bracket is fixed to the base; At least three pressure rollers are rotatably mounted on the bracket and surround to form a roller pressing space for clamping the mandrel, wherein at least one pressure roller is a position-adjustable movable pressure roller, the movable pressure roller having an open position away from the mandrel and a winding position pressing against the mandrel; The pressure plate is rotatably connected to the bracket and has an open position that avoids the mandrel and the wire mesh, and a pressed position that presses the edge of the wire mesh against the mandrel or the lower wire mesh.

2. The large aspect ratio wire mesh liquid-absorbing core winding device as described in claim 1, characterized in that, The number of pressure rollers is four, including two fixed lower pressure rollers and two movable pressure rollers, with the two movable pressure rollers located above the mandrel.

3. The large aspect ratio wire mesh liquid-absorbing core winding device as described in claim 2, characterized in that, The bracket has a pair of mirror-shaped adjustment holes, and the two movable pressure rollers can move along the adjustment holes to switch between the opening station and the winding station.

4. The large aspect ratio wire mesh liquid-absorbing core winding device as described in claim 3, characterized in that, The adjustment hole is a V-shaped hole.

5. The large aspect ratio wire mesh liquid-absorbing core winding device as described in claim 1, characterized in that, The pressure plate includes a connecting plate, a connecting arm, and a pressing plate. The connecting plate is rotatably connected to the bracket, one end of the connecting arm is fixedly connected to the connecting plate, and the other end of the connecting arm is fixedly connected to the pressing plate.

6. The large aspect ratio wire mesh liquid-absorbing core winding device as described in claim 5, characterized in that, The shape of the pressing surface of the pressing plate matches the outer peripheral side of the mandrel.

7. The large aspect ratio wire mesh liquid-absorbing core winding device as described in claim 1, characterized in that, The support / pressure plate is made of metal or plastic.

8. The large aspect ratio wire mesh liquid-absorbing core winding device as described in claim 1, characterized in that, The material of the pressure roller includes at least one of metal, plastic, rubber and ceramic, and the mandrel is a metal material.

9. A method for rolling a high aspect ratio wire mesh liquid-absorbing core, implemented using the high aspect ratio wire mesh liquid-absorbing core rolling device as described in any one of claims 1-8, characterized in that, Includes the following steps: S1. Place the movable pressure roller in the open position and place the mandrel in the roller pressing space, then drive the movable pressure roller to the rolling position to press and fix the mandrel. S2. Introduce the end of the wire mesh from one side of the pressure plate, and allow part of its width to pass through the roller pressing space; S3. Rotate the mandrel to wind the end of the wire mesh onto the mandrel to form the first turn; S4. When the first winding is completed and the end of the wire mesh is exposed from above, rotate the pressure plate to the pressed position to press the end of the wire mesh under the subsequent wire mesh to be wound, and then continue to rotate the mandrel to complete the winding of all the wire mesh. S5. Weld the starting and ending ends of the wound wire mesh to fix it, forming a circumferentially continuous wire mesh sleeve.

10. The method for rolling a high aspect ratio wire mesh liquid-absorbing core as described in claim 1, characterized in that, It also includes the following steps: S6. Place the welded and shaped wire mesh sleeve together with the mandrel into the heat pipe shell, and then pull out the mandrel, leaving the wire mesh sleeve inside the shell to form a liquid-absorbing core.

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